If the sperm gamete that fertilizes an egg has

How do the evolutionary chart and the video support the claim that all living things are made up of cells?

How did alexander fleming’s research solve a societal problem? he developed ways to treat inherited diseases. he advocated for regular hand washing to kill germs. he discovered a new type of medicine that could treat infections. he discovered the cause of mad cow disease, an emerging disease.

How secretion and excretion both are different? explain in simple language.